Debonding location in asphalt concrete associated with moisture damage

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Journal titleJournal of Materials in Civil Engineering
Pages497509; # of pages: 13
SubjectRoads; Asphalt concrete, Stripping, Aggregates, Moisture content, Laboratory tests; Roads/Pavement; Roads
AbstractThis paper evaluates the existing adhesion theories and stripping mechanisms suggested in the literature. Factors contributing to the lack of success in predicting stripping susceptibility of asphalt concrete in the laboratory are also discussed. An earlier comprehensive investigation of the stripping phenomenon revealed serious deficiencies in the current approach to the problem. First, the interaction between the different components of the asphalt-concrete mixture under a wide temperature range is neglected. It is proven that differential thermal contraction, as a result of the large difference in the coefficients of thermal contraction, is an important factor. This paper addresses another deficiency, which is the lack of a precise description of the location where debonding associated with moisture occurs. Observations made during the experimental investigation revealed that initial separation in the compacted mix takes place between the asphalt matrix (mix of asphalt cement and fine material) and coated aggregate particles
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AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number35171
NPARC number20374156
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Record identifier1b8b768a-a02a-4a6a-bf74-04bfa3c91578
Record created2012-07-23
Record modified2016-05-09
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